Fastener for detachably assembling two parts



C- 2.3, 1945- J. E. F. GOBIN -DlT inf-DDE 2,387,575

FASTENER FOR DETACHABLY ASSEMBLING lIWO PARTS Filed oct. 23, 1941 Patented oet. 23, 1945 U-Nilrea smrea- PATENT omer.

EASTENERFQRzDETACHABLY AS'SEMBLINGA .TWO PARTS JeanY Emile FranpsiGobin dit Daud,` Neuillysur- Seine;` 4France; `ves Gustodian ted in the Alien Property Applicationctober-ZS, 1941, Serial No..416,269 IILErance April 2, I1941 sf claims. (C1. 244222 to be wedgedin a female, ory socket, elem'entbyl 55 relative displacement of. said elements. transfversely to said. stud.

The, object of my` invention. is toy provide a` fastener of this type. which isbetter adaptedlto.A

meet the requirements of, practice` thanl those.- lo:

made for the same purpose.A uptothepresent. time.

According toiafeature of .my invention, the female element or. socket. which.aceommodatess the` stud so as to permit thistransverse weclgingA engagement thereof, isfsecuredlto thelfabrimor; otherpartl to be assembled by meansof: the fas tener, through means includingat. leastone pro jection adapted to he` driven through` saidfabria oreciuivalent` part and deformed by engagement 20.

in a suitable locking memben, these securing:` meansapplying said fabric against the. peripheryy of `said female element. whereby the fabricacevers said female element' on the side. thereoiop posed to that through' which the stud'isintro- Y duced thereint'o:`

According to another feature of the. invention when the articleof clothing on whiclfifthefas-y tener is mounted isK made.' of a nonfelastic., fabric, l

elastic=meansf areprovidedfor urgingsaidl` stud 3'0 in wedged' relation with" said female element,i

Other features of the present invention. will be hereinafter described' with reference to.. pre,- ferr'ed embodiments thereof after described with reference to the'accompany ing drawing, giveny merely by way of"examp le,. and in which: i

Fig. 1` is a view', partly in elevationand partly. 40 extension including a curved riveting surface 8a,

in section, of a fastener made. according. to a. rst embodiment ofthe invention, eachelement-l being fixedv to a fabric, thisview. corresponding, to a relative position. of, theelementsfimwhichl the stud is partly introduced into, theffemale ele-n 45 ment,y prior toA its.. being displaced tramsverselyffv so. as. to ,wedge it infastening. position;v

Figi. 2 is. a View.y similar to Fig.; 1. showingthe elementsinA the position they occupy," after` ber for securing.the.female elements to the-fab-4 Fig. 5A is\a.view similarto. Fig-3, but-corre` sponding toa modification;

Fig, 6 is a perspective vie-W showingVK a pair:

of. drawers fitted.- with f fasteners 1 made. according tothe invention. f l

The fastener according to.: the invention as illustrated by the drawing` includestwo elements,

to Wit:

a..Ama1e elementincludingv a stud l, integral witha flat base 3; and.

li. A :female element including` azfrustol-conical portion.. 8; and.. a. flat. wall. provided with av sl-o IU. adapted to cooperate with studV I;

Stud I: has arelatively small base@ or neck.

4 and. an.enlarged head` 2p It. is lhollow and has a. frusta-conical side-wall.

The top-of the head. 2. o'f thestudds concaveA so as to. form aninward` projection of: substantially conicalshape the baseof which` issubstantially, equalin diameter.' to. the maximuminner diameter of. the stud` head.4 v

This male element is fixed to one ofvthe parts-` to be assembledthrougnthe. fastener, for inface of said piece 5` from base.3.

against each other, the upper end of shank 'Lis forced against the `conical inward projectionof stud head 2. and benttoutwardly sothatparts 3.. These preferred embodiments willbe.. herein- 35 and 6 are i'rnly secured to each other l(and to.

fabric 5)` in rivet-like fashion.

As for the female element. its. frusto-conical inner portion 8. carries .an outward flange-like and" terminating in an annular locking chamber 9L The total height of'portion 8a, designated by H on the drawing, is greater than theheight hY this transverse displacement when the studi mi 50' greaterV than that of stud head2, so that said stud wedged inthe female element;

Fig. 3is a sectionalview, onxthe.- line. 3-3 off: Eig. 1, of theinner part ofthe: female element.; and a front view of the stud. i

Fig; 4s is-aperspective'viewftshowing:tlxememev 55 head can passA freely through saidfendofthe slot".`

Theismaller portion Ill'z ofsaid` slot is ofja width smaller-than the diameter ofl stud head 2f and adaptedl to accommodate' the-base orl neck fof saidz-:stuch Preferably, the width ofthe slot de` creases gradually from the wider portion |01 thereof toward the narrower portion |02.

'Ihe female element of the fastener is secured to the fabric II on which it is to be mounted by means of a washer or cap I2 provided with prongs or projections I3 (Fig.` 4). Retaining member I2 is applied on the opposite face of fabric I I from female element 8, and its prongs I3 are driven across said fabric. They bearagainst the surface 8a of said female element and are deflected outwardly by said curved annular surface, their ends being forced into locking chamber 9. I thus obtain a rivet-like assembly of members I 2 and 8 on fabric I I.

It should be noted that with this securing de-V vice, fabric is applied against the open end of tubular member 8, which is thus closed.

This fastener will work as follows:

The male and female elements having been secured on the corresponding fabric parts, stud I is brought opposite the larger portion |01 of slot I0, and pushed through said portion of the slot into female element 8. This is the position of the parts illustrated by Fig. 1 and Fig. 3 (solid lines). Then the male and female elements are displaced in a direction transverse to the stud, relatively to each other, so that stud neck 4 is wedged in the smaller portion |02 of slot I 0. This position is shown by Fig. 2 and the dash-and-dot line of Fig. 3.

In the course of this movement, coaction of the oblique edges of portion |02 of the slot with the conical wall of stud brings the flat base 3 of the male element into contact with the lower edge of surface 8a (Fig. 2). 'I'he total thickness of the fastener is thus reduced to a minimum.

It should be noted that, preferably, a certain clearance must be left between stud and the frusto-conical walls of portion 8 of the female element (Fig. 2) and also between the neck 4 of said stud and the end of the smaller portion |02 of the slot (Fig. 3) when neck 4 has wedged against the oblique edges of said smallel` portion I'.` of the slot.

In order to reduce the diametral dimensions while allowing for this clearance, the apex angles of the stud outer wall and of portion 8 respectively are preferably chosen equal and the smaller portion |02 of the slot extends as far as the line of junction of the frusto-conical wall of portion 8 with the flat wall in which said slot I0 is formed.

In order to reduce the thickness of the fastener, stud is preferably made of a height such that. in the wedged position thereof (Fig. 2), the head 2 of said stud` is substantially in contact with fabric II, that is'to say a height substantially equal to the total height of the female element of the fastener. Preferably the above mentioned difference of heights I-I and h is at least equal to the distance between the upper surface of -base 3 andthe level at which stud has its smallest diameter for securing the wedging contact of the oblique edges of portion |02 of the slot I0 against the outer conical wall of stud The portion of fabric which covers the open ,end of portion 8 of the female element protects said element against the introduction of foreign bodies as might cause jamming of the fastener.

In the modification of Fig. 5, the orice provided in the flat bottom wall of the female element includes a central portion 01 of a diameter greater than that of the stud and a plurality of radial notches |02 of smaller width. With this construction-it is easy to secure the female element in suitable angular position on the fabric.

kAs a matter of fact, the fastener can work properly whatever be the angular position in which the female element is secured to the fabric.

In order to keep the fastener in gripping engagement, when the fabric of the clothing article 011V which it is mounted is not elastic, I preferably combine with said fastener an elastic member tending to pull the fabric in the desired direction. In the example shown by Fig. 6, this elastic member consists of a spring or elastic strip inserted in the belt of a pair of drawers and the tension of which tends to keepthe stud wedged in the slot of the female element.

'This spring of elastic strip may be concealed in a suitable sheath provided along the upper edge of the drawers.

If the article of clothing includes a plurality of fasteners a, f. i., three fasteners (Fig. 6), they are disposed preferably along a line substantially at right angles to the direction of the thrust exerted by said elastic means.

In a general manner, while I have, in the above description, disclosed what I deem to be practical Vand eicient embodiments of the present invenprises, in combination, a male element includingA a substantially frusto-conical stud, a female element including a substantially frusto-conical hollow portion adapted to accommodate said stud, and a at wall closing one end of said hollow portion provided with a slot extending substantially to the base of said hollow portion and adapted for wedging engagement with said stud under the effect of a relative sliding of said male and female elements transversely to said stud, the apex angles of said frusto-conical stud and said frusto-conical hollow portion being equal.

2. A fastener according to claim 1 in which the total height of said female element, from the top of said hollow portion to the under face of said flat transverse wall is substantially equal to the height of said stud.

3. A fastener of the type described, for detachably assembling two parts together which comprises, in combination, a male element including having an inner wall surface profile coincidable with an outer surface profile of the stud throughoutthe length of the latter, and a transverse wall integral with one end of said tubular element and provided with a slot for wedging engagement with said stud, said slot having a larger end of a size greater than said enlarged stud head and eccentrically disposed with respect to said female element, and also having a smaller end terminating substantially at the inner wall of said tubular element whereby the stud can be inserted through the larger end of said slot and the coincidable profile surfaces can be moved transversely of the direction of insertioninto engagement with one another.

JEAN EMILE FRANooIs GOBIN m DAUD. 

